Chapter 4—Monutoring Accidental Radiation Releases * Figure 4-6—Typical RAMs Array for Tunnel Shot (“Mission Cyber,” Dec. 2, 1988) Surface Locations Subsurface Locations Ye “oo Tazssssss @ RAM Locations Scale hK— = 200 A total of 41 RAMs (15 above the surface, 26 belowground) are used to monitor the containmentof radioactive material from a horizo tunnel test. SOURCE: Modified from Department of Energy. Thermoluminescent Dosimeter (TLD): When heated (thermo-), the TLD releases absorbed energy in the form oflight (-luminescent). The intensity of the light is proportional to the gammaradiation absorbed, allowing calculation of the total gamma radiation exposure. GammaRadiation Exposure Rate Recorder: A pressurized ion chamber detector for gammaradia- tion is connected to a recorder so that a continuous record of gammaradiation is obtained and chan; in the normal gammaradiation levelare easily se Microbarograph: This instrument measures ¢ records barometric pressure. The data are useful interpreting gammaradiation exposure rate recor At lower atmospheric pressure, naturally occurr radioactive gases (like radon) are released in gre: amounts from the Earth’s surface and their radio tive decay contributes to total radiation exposure